A house full of stuff can be very depressing. A cluttered room saps one's spirits. One reason, obviously, is that there's less room for people in a room full of stuff. But there's more going on than that. I think humans constantly scan their environment to build a mental model of what's around them. And the harder a scene is to parse, the less energy you have left for conscious thoughts. A cluttered room is literally exhausting.

Graham says he only buys things he absolutely needs and says that getting rid of his stuff was like taking off ankle weights. How do you deal with all your stuff? Let us know in the comments.